Published Saturday, 21 July 2012
A photograph of The Wanted singer George kissing a female fan in a nightclub emerged this week and the image is said to have been the breaking point for Keegan, who stars as Tina in Coronation Street.
The pair was set to wed but called off the engagement in April, despite continuing their relationship.
However, the couple has now split for good, with a spokesman telling newspaper The Sun: "They are not together."